Index. 601 



loniaation and Pressure for Rontgen Rays in different Gases, the Relation 



between (Crowther), 34, 

 Ions formed in Gaseous Media, Mobility and Diffusion of the (Wellisch), 1. 

 Ions produced in Air by Ultra- Violet Light, The Mobilities of the (HuOtHEs), 



483. 

 Ions through a Gas, Theory of the motion of charged (Thomson), 375. 

 Ions of Oxygen, An attempt to Detect a Difference in the Magnetic Properties 



(Pearson), 373. 



Jacobi's double-residue theorem in relation to the theory of point-groups 



(Dtxon), 472. 

 Jones, H. 0., A coloured thio-oxalate, 94. 

 Jones, H. 0. and Matthews, J. K., Note on the Reduction of Nitrosyl 



Chloride, 529. 



Kathode region. On certain phenomena of the (Orange), 217. 



Kaye, G. W. C., The Emission of Rontgen Rays from thin Metallic Sheets, 



269. 

 Kleeman, R. D., The nature of the ionisation produced in a gas by y rays, 



169. 



Labt, T. H., a string electrometer, 106. 



Leeches from Ceylon (Harding), 233. 



Leucocytes in vitro. The examination of living (Ponder), 30. 



Light Emission, Discontinuities in (Campbell), 310. 



Light Emission, Discontinuities in, II. (Campbell), 513. 



LiLLiE, D. G., Notes on the Larger Cetacea, 347. 



On Petrified Plant Remains from the Upper Coal Measures of Bristol, 



411. 

 Lithohius, Abnormal pair of appendages in (Doncaster), 178. 

 Lithohius, Abnormal pair of appendages in (Sinclair), 235. 

 LiTTLEWOOD, J. E., Elected Fellow 1909, January 25, 293. 



A Class of Integral Functions, 590. See Transactions xxi. 



LusBY, S. G., Elected Associate 1910, February 21, 593. 



Some Experiments on Ionisation in Dried Air, 459. 



MacMahon, p. a., The Operator Reciprocants of Sylvester's Theory of 



Reciprocants, 292. See Transactions xxi. 

 Magnetic Properties of the Two Kinds of Ions of Oxygen (Pearson), 373. 

 Matthews, J. K. and Jones, H. 0., Note on the Reduction of Nitrosyl 



Chloride, 529. 

 Mercer, J., Plemelj's Canonical Form, 292. See Transactions xxi. 

 Mesitylene, Absorption spectra of (Purvis), 89. 

 Mines, G. R., Elected Fellow 1908, November 23, 293. 



On the relative velocities of diffusion in aqueous solutions of rubidium 



and caesium chlorides, 381. 



